Gilmour’s classic solo was cut using a combination of Hiwatt amps and Yamaha rotating speaker cabinets, Bob Ezrin—co-producer of Pink Floyd's The Wall—told Guitar World several years ago. But with Gilmour, he added, equipment is secondary to touch: “You can give him a ukulele and he’ll make it sound like a Stradivarius.”

Which doesn’t mean Gilmour didn’t fiddle around in the studio when he laid down the song’s unforgettable lead guitar part.

“I banged out five or six solos,” Gilmour said. “From there I just followed my usual procedure, which is to listen back to each solo and make a chart, noting which bits are good. Then, by following the chart, I create one great composite solo by whipping one fader up, then another fader, jumping from phrase to phrase until everything flows together. That’s the way we did it on ‘Comfortably Numb.’”